# System Design Refresher vs SwipePrep

The clearest difference is update cadence: SwipePrep at fortnightly against System Design Refresher's monthly. SwipePrep also leads on iOS requirement (15.1 vs 26.2). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

System Design Refresher ships an update monthly, SwipePrep fortnightly. The most recent releases landed on September 30, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | System Design Refresher | SwipePrep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/swipeprep/id6764313686/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | — | Free |
| Size | 18 MB | 40 MB |
| Requires iOS | 26.2 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Saurabh Sharma](https://appshunter.io/developer/1883599017) | [Diplesh Mankape](https://appshunter.io/developer/1895728345) |

## What reviewers say

### System Design Refresher

[App page](https://appshunter.io/ios/app/system-design-refresher/id6760277935)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### SwipePrep

[App page](https://appshunter.io/ios/app/swipeprep/id6764313686)

This app transforms technical interview questions into a flashcard-style swiping game. Master coding concepts by swiping right on questions you know and left on those you need to revisit. Track your progress visually and build a daily study habit.

**Highlights:** Flashcard-style question swiping, Mastered and Revisit stacks, Visual progress tracking, Algorithmic Rank dashboard, Activity heatmap and streaks, Curated high-yield interview patterns

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is System Design Refresher free?

System Design Refresher is free to download, with no in-app purchases.

### Is SwipePrep free?

SwipePrep is free to download, with no in-app purchases.

### Do System Design Refresher or SwipePrep have ads?

Neither System Design Refresher nor SwipePrep shows ads.

### Which is updated more often, System Design Refresher or SwipePrep?

System Design Refresher ships an update monthly, and SwipePrep fortnightly. Most recently, System Design Refresher was updated on September 30, 2026 and SwipePrep on October 11, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*